Disinfecting and deodorizing process.



, UNITED STATES PATENT OFFICE.

EUGENE FOURNIER, or PARIS, FRANCE.

DISINFEGTING AND DEODORIZING PROCESS.

I To all whom it may concern.

proved and complete manner, the deodorization of rooms, orother places, or matters, which have been disinfected by means of formaldehyde.

It has been proposed to get rid of the odor of formaL dehyde by means of ammoniacal vapor in quantity sufficient .tosaturate'the aldehydic vapors. Damage hyde vapors, with ammoniacal vapors gives rise howvaporanobjectionable odor resembling that of a laundry which odoris not got rid of .by the most energetic ventilation. According to my invention, I subject the aforesaid secondary products to treatment which transforms, them into iitable, odorless, compounds. For this purpose I employ 'a weak acid, preferably a volatile organic acid, efficient results being especially 1' obtained by the use of acids of the aromatic series and more particularly by the use of acids produced by heating resins, o r gums, especially gum-benzoin-which when heated, evolves benzoic acid, but on account of the disadvantages, arising from the fumes produced by gum-benzoin itself, I prefer to use benzoic acid ap- Specificationof Letters Patent.

Application filed February 12, 1906. Serial No. 300,758.

Patented July 16, 1907.

plied either by atomizing an aqueous solution thereof, or by volatilizing the acid by heat. For example, the relativequantities by weight of the. substances employed are as follows: formaldehyde gas 100, ammonia gas 52, and benzoic acid 4%.

I prefer to carry out my invention as follows, as applied to a room, for example: By ventilation I eliminote the excess of ammoniacaland other vapors resulting from the saturation of the formaldehyde vapors, with ammoniacal vapor and then I close the room and heat the benzoic acid on a fire, or stove, or the like,

until vapors cease to be emitted. The heating may be effected either in the room, or in an apparatus outside the room with a connection led into the room the said apparatus being arranged in such a manner that the acid vapors do not condense on its walls, or in the connection with the room, but the said vapors enter the room. their reaction on the aforesaid secondary products is complete, and then after ventilating the room it will be found that all objectionable odor has disappeared. It is possible to obtain the same result not only by using acids of the aromatic series but also by rising weak acids of other series having analogous properties,

i such as acetic acid in a diluted solution.

Having now particularly described and'ascertained In due time the vapors are condensed and" the nature of my said invention and in what manner the same is to be performed I declare that what I claim is:

1. A method which consists in disinfecting a room by fornmldehyde. ncuiruliziug -thc aldehyde vapors by ammonincnl vapor. and finally neutralizing the compounds created by the association of such vapors, by inLl-odiu-ing into'said room :1 vuporous solution of a weak; volatile acid.

2. A method consisting in disoufociiug a room by for fornmldchydo, neutralizing the aldehyde vapors by ammonlzical vnpol, nud finnll 'mutruliziug the compounds creuted by the ussociaiimi 01 such vapors by introducing into said room :1 vaporous solution of benzoic acid.

In testimony whereof I have hon-unto set my hand in presence of two subscribing \viluosscs.

' EUGENE hOURNlER.

'iinesscs 

